This sounds like a class C linear screen driven amp. I couldn't find the article on it but W9VMQ built such an amp using 6DQ5's in the early 60's. I think he also did some experimenting with the 813 also. I think the article was in Ham Radio magazine. Maybe someone can do a search for it. Probably around 1963 to 1965?
73 Gary K4FMX > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:amradio- > [EMAIL PROTECTED] On Behalf Of John E. Coleman (ARS WA5BXO) > Sent: Tuesday, May 23, 2006 7:34 PM > To: 'Discussion of AM Radio' > Subject: RE: [AMRadio] Re - response to input to screen grid amplifier > > Bill does the screen have a DC path to ground through the tuning coil? I > see no way that you can have grid current with no RF on the Grid. Perhaps > there is a hidden wire connecting the grid and the screen together. > > I am sending you a PDF on the 813 just to make sure that you have a > correct > one. > > > John, WA5BXO > > > > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
